I figured out the first question, the second one in lost on.
[tex] \frac{(6-x)}{x^2+3x-28} / \frac{x^2-36}{x^2+5x-36} [/tex]
Factor both of the equations, numerator and denominator
[tex] \frac{(6-x)}{(x+7)(x-4)}* \frac{(x+6)(x-6)}{(x+9)(x-4)} [/tex]
Cancel the like factors *excuse the zero im just showing you*
[tex] \frac{(0)}{(x+7)} *\frac{(x+6)}{(x-9)} [/tex]
Combine frunctions
[tex] \frac{(6+x)}{(x-9)(x+7)} [/tex]
x-9=0
x+7=0
Restrictions are 9 and -7
